Shall



H. MARSHALL & s. s. 000K, MACHINE PQR MAKING JAGK CHAIN, &c.

No. 8,815.. PatentedMar. 16, 1852.

nnrrnn srarns rarnn'r oriricn HIGKFORD MARSHALL AND SETH S. COOK, OFSTAMFORD, CONNECTICUT, ASSIGNORS TO JOHN BOSTVVIOK, JR., AND ELBERTWHITE.

ARRANGEMENT OF JACK-CHAIN MACHINERY.

Specification of Letters Patent No. 8,815, dated March 16, 1852.

To all whom it may concern;

Be it known that we, HICKFORD MAR- SHALL and SETH S. COOK, of Stamford,in

the county of Fairfield and .State of Connecticut, have invented certainnew and useeye of a link turned showing also the position to which theleversare moved for the purpose. Fig. 3, is a view of part of themachine showing themanner in which two links are united.

Similar letters of reference indicate corre sponding parts in each ofthe several figures.

A, represents the bed plate of the machine to which most of the workingparts are attached; it is secured to a wooden block C,and one of itscorners B, constituting a small horizontal table of the form of part ofa circle, overhanging a slightly recessed part I), of the face of theblock.

. E, is the mandrel around which the eyes of the links are turned orformed. It is secured in the small table 13, at a distance from thecenter, and stands up a short distance above the surface. A notch orrecess a, is formed in the plate at the back of the mandrel, extendingalso up the mandrel, being of suitable form and depth to receive onehalf of an eyefof a link. F, is another pin against which the wire restswhile the links are being formed; it is secured in the plate A, at aconvenient distance from E, and stands about the same height. A recess 7d, similar to a, and at right angles to it is formed in theplate behindthis pin E.

Gr, is a flat bar of metal hung on a fixed pivot b, above the plate A,and constituting a swinging jaw, it is provided with a tooth 0, at itsend, and is capable of swinging across the plate A, so as to bring thepoint of its tooth a, about midway between the mandrel E, and pin F.

H, is a lever, hung on a fulcrum pin 6,

above the plate A, and having its shorter arm formed as a cam. The jawGr, is al ways thrown back against this cam by a spring I, beingconfined to the plate A, so as to prevent its rising, by a guide bar J,which is secured above it.

K, is the turning lever hung below the small table B, on a pin 2', inthe center of the said table, (regresented by a-dotted circle in 7 allthe figures It carries on its upper side the turning pin f, which isnearly close to.

the edge of the table, being just allowed to clear it.

9, represents the piece of wire of which a link is to be formed, and h,in Fig. 3, a link to which another is about to be joined.

The machine is put in operation in the following mannerrThe levers H,and K,

are both governed by hand, and can be moved to the position shown inFig. 1 to that shown in Fig. 2, and vice versa. While they are in thefirst named position, the wire, which is cut to the required lengths toform a link, is laid on the plate A across the small table B, with oneend slightly overhanging the outside edge of the table. The long arm ofthe lever H, is then thrown back to the position shown in Fig. 2, andthe cam end drives the nipping aw G, forward and causes the point of itstooth to press on the wire and force it against the pin F, and mandrelE, giving it a slight bend, which assists in forming the eye, and thenholding it secure while the eye is turned. The lever K, is then movedfrom the position shown in Fig. 1, to that shown in Fig. 2, and the pinf, moving around the rim of the table carries around the end of the wireand bends it around the mandrel E, and thus forms one eye. The wire isthen taken OK the mandrel and its ends reversed in the machine, see 9,(Fig. 3,) the eye first formed.

being placed edgewise upward and one side put inthe recess (Z, tobringthe straight part fiat on the plate ready for turning the other eyeat a right angle to it, by a similar movement of the parts. To make thechain, the link last formed is placed with one eye fiat on the plate,and one turned edgewise upward in the recess a. (See 71 Fig. 3.)The-link to be joined having one eye formed is put in the machine like9, Fig. 3, and the straight parts to be turned put through the forwardeye of the link h, and when it is pin f,) moving under the table B, inthe turned to form the eye, it incloses the eye manner and for thepurpose substantially as 10 of h. set forth and shown.

What we claim as our invention and de- HICKFORD MARSHALL. 5 sire tosecure by Letters Patent, is v SETH S. COOK.

' The arrangement on the bedplate A of the Witnesses: nipping jaw G, themandrel E, and pin F, J AOOB S. GUERNSY,

with the turning lever K (furnished with CHR. HAWLEY.

